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Altera_Forum
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14 years ago

Stratix IV and DDR2 - pin assignment problem?

Hello,

i created a megafunction with the wizard for using the ddr2 memory on my stratix IV-board.

But there seems to be a problem in the pin assignment. while place&route i get the following error:

Error: Can't place M1_DDR2_dm[0] with OCT calibration block ddrRAM:mem_if|ddrRAM_controller_phy:controller_phy_inst|ddrRAM_memphy_top:memphy_top_inst|ddrRAM_oct_control:uoct_control|sd1a_0 in I/O Bank 3A because it already has pins driven by OCT calibration block termination_blk0

[...]

here is an excerpt of my pin-assignment file:

-----------------

set_location_assignment PIN_AF25 -to termination_blk0~_rup_pad

set_location_assignment PIN_AG25 -to termination_blk0~_rdn_pad

set_instance_assignment -name PASSIVE_RESISTOR "PULL-UP" -to OCT_RUP

set_instance_assignment -name PASSIVE_RESISTOR "PULL-DOWN" -to OCT_RDN

set_location_assignment PIN_AV32 -to M1_DDR2_dq[0]

set_instance_assignment -name IO_STANDARD "SSTL-18 CLASS I" -to M1_DDR2_dq[0] -tag __ddrRAM

set_instance_assignment -name INPUT_TERMINATION "PARALLEL 50 OHM WITH CALIBRATION" -to M1_DDR2_dq[0] -tag __ddrRAM

set_instance_assignment -name OUTPUT_TERMINATION "SERIES 50 OHM WITH CALIBRATION" -to M1_DDR2_dq[0] -tag __ddrRAM

-----------------

The pin-assignment-file was partially created with the tcl-script (tools -> tcl scripts -> pin_assignments.tcl), that was generated with the megafunction.

Can anyone help me?

Or can anyone submit a working pin-assignment-file for stratix iv?

Greetz

4 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    have you taken a look at the example designs that come with the devkit?

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    In UniPHY the oct pins are called OCT_rup and OCT_rdn. This is what you need to connect your pin assignments to.

    In your project they are connected to termination_blk0~_rup_pad etc. This is an AltmemPHY thing. Reassign these pins assignments to the correct pins.

    I would delete all assignments and rerun the <>_pin_assignments.tcl file.